Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc1579aeae99985…

MALICIOUS

PDF

45.8 KB Created: 2020-07-16 18:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb310be42d567f4af23004b7a9508e94 SHA-1: 8a74bf452786131d77c34f8c6b1444b5451eeeb6 SHA-256: ddc1579aeae9998541215b0d511d65075d40b22a632429d6a6a08b88a72d841d
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm, and SE_CLOUD_DOC_LURE points to impersonation of cloud services to trick users. The primary malicious IOC is the redirector URL, which is likely used to deliver a second-stage payload.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=pdf%20reader%20for%20ipad%201
    • http://files.camera1.ca/uploads/1/3/1/3/131380413/pizixejawij.pdf
    • http://files.easternshorechess.com/uploads/1/3/1/3/131382531/guriperoforozige.pdf
    • http://files.studybuddyasia.com/uploads/1/3/1/8/131871859/tipojaj-jinijanu.pdf
    • http://files.dancesummit.ca/uploads/1/3/2/7/132710787/7473585.pdf
    • http://files.kimberlyjherb.com/uploads/1/3/1/4/131407734/6aaa27c09255.pdf
    • http://files.studybuddyasia.com/uploads/1/3/1/8/131
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/1977927567.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/pupuwajajabirobavixovebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/85967945439.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/korafojalemunawadit.pdf
    • https://vagiseni.files.wordpress.com/2020/06/desunusazapixufixugefege.pdf
    • https://setuduf.files.wordpress.com/2020/07/61432594788.pdf
    • https://pilelebomu.files.wordpress.com/2020/06/zilinafinujidazavesowa.pdf
    • https://fazagov.files.wordpress.com/2020/07/witemekovufefuwo.pdf
    • https://jafujanile.files.wordpress.com/2020/07/sozoredolifirufefez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6139/5102/files/woligiwugiziwalel.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/xaleli.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxupajajivamuwiri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90554838216.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/49998097481.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/22434054891.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078f4.bin
a317f9a93f5d506b6f0405a187a398b1d65777b766f5db077ccc45462ede6746		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F4 4480 bytes
font_01_sfnt_off00008838.bin
d0fb28d9856aca2db46549aba4204f279fbd6b3d30578f09f13f265df33e61de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 9932 bytes

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